Section 8.5
Solving Trig Equations
Example 1
2cos2x ­ 1 = 0
for 0 ≤ x ≤ 360°
Example 2
sin2x + 3sinx + 2 = 0
Example 3
cosx ⋅ tanx = 3cosx
Example 4
2cosx = sinx
for 0 ≤ x ≤ 360°
for 0 ≤ x ≤ 2π
for 0 ≤ x ≤ 360°
Example 5
2sinx ­ cscx = 1
Example 6
2cot2x + 3cscx = 1
for 0 ≤ x ≤ 360°
for 0 ≤ x ≤ 2π